Bulten-kanthal Ab

Bulten-kanthal Aktiebolag

Bengt Magnusson

Hakan O Lindgren

Hans Gurtler

An apparatus replaceably carries an electrical resistance element for a furnace. The electrical element is of serpentine configuration having a plurality of U-shaped portions. At least one plate-shaped carrying element is mechanically fastened in a block of ceramic fibrous material. The carrying element includes a plurality of through-passages into which the U-shaped portions of the electrical element are inserted. The through-passages each include side walls and transverse walls which restrain movement of the electrical element in all directions except a direction in which the electrical element is inserted and removed. The carrying element is spaced from the adjacent curved segments of the U-shaped portions. The electrical element terminates in elongated terminals which are carried by a plug of fibrous ceramic material. The electrical element is situated within a recess of the ceramic block. The plug is sized to fit into an opening in the block on one side of the recess so as to close-off that opening simultaneously with the insertion of the electrical resistance element.

Device for carrying electrical resistance elements

An annealing oven for wire and the like includes a tubular elongated heater made of electrical resistance alloy material. The wire passing therethrough is so guided that it remains at all times out of contact with the heater and no current passes through the wire. Relatively movable sections of heat-insulating material laterally jacket the tube to facilitate threading a wire through a slot in the tube and so as to facilitate rigid heating with a minimum of heat loss, so as to adjust heat loss as a part of temperature control, and so as to effect rapid cooling of the tube. The sections are arranged in pairs, and a pair of such sections has a lesser insulating capacity than the preceding section, taken in the direction of wire movement. The device is compact and takes a minimum of space adjacent to any material processing machine.

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Hallstahammar, Sweden

Bengt Magnusson